Joseph
Ten brothers visited Joseph in Egypt, Benjamin did not go.
Joseph
According to the bible Joseph was sold by his brothers to some traders going to Egypt. Joseph was later sold to Potiphar the captain of the palace guard. Joseph find favour with Pharaoh when he interprets a dream of pharaoh's. Pharaoh is pleased with Joseph and makes him governor of all Egypt. You can read the story in Genesis chapt 37 - 40
As Joseph was the governor of Egypt, second in power to pharaoh, his family were treated royally.
Joseph was a governor in Egypt, only the Pharaoh was above him. So he could put anyone in prison.
They didn't, only Joseph became a slave, he became a slave beacause his brother Simion sold him to slave dealers, and they took him to Egypt where the Pharaoh bought him.
Joseph (son of Jacob)
he became visier during the Middle Kingdom
no his son Joseph how became governor of Egypt gave him and his brothers including his descendants the land of Goshen
yes! because after it he became the pharaoh (king) of Egypt
Zaphenath-paneah was the name that Pharaoh gave to Joseph when he made him governor of Egypt. This takes place in Genesis 41:41 in the Bible, so you can read it for yourself how it all happened. It was common in Egypt when for example a pharaoh ascended the throne for his name to be changed. I believe this is why Joseph's name was changed.